<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      //需要有结束语句 结束返回值 ，递归语句的返回值需要调用自身
      function fn(n) {
        if (n == 1) {
          return n;
        }

        return n * fn(n - 1);
      }
      console.log(fn(100));
    </script>
  </body>
</html>
